Entognatha
- n. 昆虫亚门中的一个类别，包括弹尾亚纲、双尾亚纲和原尾亚纲
Entognatha
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abstract:
The Entognatha are a class of ametabolous arthropods, which, together with insects, makes up the subphylum Hexapoda. Their mouthparts are entognathous, meaning they are retracted within the head.
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WordNet